that children only learn to read once, and that this process is easiest in the language a child speaks best. For Spanish speaking children, learning to read and write in Spanish makes it more likely they will later achieve a high level of English literacy

In Eiber's Dual Language Program, students receive integrated instruction in Spanish and English.

70 percent of instruction is initially delivered in Spanish, and 30 percent of instruction is in English. As a student progresses through the program, the ratio gradually evolves to a 50-50 balance of English and Spanish instruction.